const toString = Object.prototype.toString;

export function is(val: unknown, type: string) {
	return toString.call(val) === `[object ${type}]`;
}

export function isDef<T = unknown>(val?: T): val is T {
	return typeof val !== 'undefined';
}

export function isUnDef<T = unknown>(val?: T): val is T {
	return !isDef(val);
}

export function isObject(val: any): val is Record<any, any> {
	return val !== null && is(val, 'Object');
}

export function isEmpty<T = unknown>(val: T): val is T {
	if (isArray(val) || isString(val)) {
		return val.length === 0;
	}

	if (val instanceof Map || val instanceof Set) {
		return val.size === 0;
	}

	if (isObject(val)) {
		return Object.keys(val).length === 0;
	}

	return false;
}

export function isDate(val: unknown): val is Date {
	return is(val, 'Date');
}

export function isNull(val: unknown): val is null {
	return val === null;
}

export function isNullAndUnDef(val: unknown): val is null | undefined {
	return isUnDef(val) && isNull(val);
}

export function isNullOrUnDef(val: unknown): val is null | undefined {
	return isUnDef(val) || isNull(val);
}

export function isNumber(val: unknown): val is number {
	return is(val, 'Number');
}

export function isPromise<T = any>(val: unknown): val is Promise<T> {
	return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
}

export function isString(val: unknown): val is string {
	return is(val, 'String');
}

export function isFunction(val: unknown): val is Function {
	return typeof val === 'function';
}

export function isBoolean(val: unknown): val is boolean {
	return is(val, 'Boolean');
}

export function isRegExp(val: unknown): val is RegExp {
	return is(val, 'RegExp');
}

export function isArray(val: any): val is Array<any> {
	return val && Array.isArray(val);
}

export function isWindow(val: any): val is Window {
	return typeof window !== 'undefined' && is(val, 'Window');
}

export function isElement(val: unknown): val is Element {
	return isObject(val) && !!val.tagName;
}

export function isMap(val: unknown): val is Map<any, any> {
	return is(val, 'Map');
}

export const isServer = typeof window === 'undefined';

export const isClient = !isServer;

export function isUrl(path: string): boolean {
	const reg = /^http(s)?:\/\/([\w-]+(\.)?)+[\w-]+(\/[\w- .\/?%&=]*)?/;
	return reg.test(path);
}
